# Scrapy settings for crawlspiderdemo project
#
# For simplicity, this file contains only settings considered important or
# commonly used. You can find more settings consulting the documentation:
#
#     https://docs.scrapy.org/en/latest/topics/settings.html
#     https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
#     https://docs.scrapy.org/en/latest/topics/spider-middleware.html

BOT_NAME = 'crawlspiderdemo'

SPIDER_MODULES = ['crawlspiderdemo.spiders']
NEWSPIDER_MODULE = 'crawlspiderdemo.spiders'


# Crawl responsibly by identifying yourself (and your website) on the user-agent
#USER_AGENT = 'crawlspiderdemo (+http://www.yourdomain.com)'

# Obey robots.txt rules
ROBOTSTXT_OBEY = False

# Configure maximum concurrent requests performed by Scrapy (default: 16)
#CONCURRENT_REQUESTS = 32

# Configure a delay for requests for the same website (default: 0)
# See https://docs.scrapy.org/en/latest/topics/settings.html#download-delay
# See also autothrottle settings and docs
#DOWNLOAD_DELAY = 3
# The download delay setting will honor only one of:
#CONCURRENT_REQUESTS_PER_DOMAIN = 16
#CONCURRENT_REQUESTS_PER_IP = 16

# Disable cookies (enabled by default)
#COOKIES_ENABLED = False

# Disable Telnet Console (enabled by default)
#TELNETCONSOLE_ENABLED = False

# Override the default request headers:
#DEFAULT_REQUEST_HEADERS = {
#   'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
#   'Accept-Language': 'en',
#}

# Enable or disable spider middlewares
# See https://docs.scrapy.org/en/latest/topics/spider-middleware.html
#SPIDER_MIDDLEWARES = {
#    'crawlspiderdemo.middlewares.CrawlspiderdemoSpiderMiddleware': 543,
#}

# Enable or disable downloader middlewares
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
# 开启自定义的下载中间件
# DOWNLOADER_MIDDLEWARES = {
#    'crawlspiderdemo.middlewares.UserAgentMiddleware': 543,
#    # 'crawlspiderdemo.middlewares.ProxyMiddleware': 545,
#    'crawlspiderdemo.middlewares.SeleniumMiddlewares': 546,
#    'crawlspiderdemo.middlewares.CheckUA': 544,
# }

# settings中添加UA的列表
USER_AGENTS_LIST = [
    "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 2.0.50727; Media Center PC 6.0)",
    "Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 1.0.3705; .NET CLR 1.1.4322)",
    "Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.2; .NET CLR 3.0.04506.30)",
    "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN) AppleWebKit/523.15 (KHTML, like Gecko, Safari/419.3) Arora/0.3 (Change: 287 c9dfb30)",
    "Mozilla/5.0 (X11; U; Linux; en-US) AppleWebKit/527+ (KHTML, like Gecko, Safari/419.3) Arora/0.6",
    "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.2pre) Gecko/20070215 K-Ninja/2.1.1",
    "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9) Gecko/20080705 Firefox/3.0 Kapiko/3.0",
    "Mozilla/5.0 (X11; Linux i686; U;) Gecko/20070322 Kazehakase/0.4.5"
]

# Enable or disable extensions
# See https://docs.scrapy.org/en/latest/topics/extensions.html
#EXTENSIONS = {
#    'scrapy.extensions.telnet.TelnetConsole': None,
#}

# Configure item pipelines
# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
# ITEM_PIPELINES = {
#    'crawlspiderdemo.pipelines.CrawlspiderdemoPipeline': 300,
#    # 'crawlspiderdemo.pipelines.BooksChinapiderPipeline': 301,
#    'crawlspiderdemo.pipelines.MongodbPipeline': 302,
#     'scrapy_redis.pipelines.RedisPipeline': 400,
# }
# # 分布式爬取,断点续爬
# # 分布式去重的类
# DUPEFILTER_CLASS = "scrapy_redis.dupefilter.RFPDupeFilter"
# # 分布式的调度器   用来存储request对象的队列 （实现持久化-- 指纹  request持久化存储）
# SCHEDULER = "scrapy_redis.scheduler.Scheduler"
# # 是否进行持久化
# SCHEDULER_PERSIST = True
#
# REDIS_URL = "redis://127.0.0.1:6379"


# 渲染服务的url
SPLASH_URL = 'http://127.0.0.1:8050'
# 下载器中间件
DOWNLOADER_MIDDLEWARES = {
    'scrapy_splash.SplashCookiesMiddleware': 723,
    'scrapy_splash.SplashMiddleware': 725,
    'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware': 810,
}
# 使用Splash的Http缓存
HTTPCACHE_STORAGE = 'scrapy_splash.SplashAwareFSCacheStorage'

# 去重过滤器
# DUPEFILTER_CLASS = 'scrapy_splash.SplashAwareDupeFilter'
# DUPEFILTER_CLASS = "scrapy_redis.dupefilter.RFPDupeFilter" # 指纹生成以及去重类
DUPEFILTER_CLASS = 'crawlspiderdemo.dupefilter.SplashAwareDupeFilter' # 混合去重类的位置

SCHEDULER = "scrapy_redis.scheduler.Scheduler" # 调度器类
SCHEDULER_PERSIST = True # 持久化请求队列和指纹集合, scrapy_redis和scrapy_splash混用使用splash的DupeFilter!
ITEM_PIPELINES = {'scrapy_redis.pipelines.RedisPipeline': 400} # 数据存入redis的管道
REDIS_URL = "redis://127.0.0.1:6379" # redis的url


# Enable and configure the AutoThrottle extension (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/autothrottle.html
#AUTOTHROTTLE_ENABLED = True
# The initial download delay
#AUTOTHROTTLE_START_DELAY = 5
# The maximum download delay to be set in case of high latencies
#AUTOTHROTTLE_MAX_DELAY = 60
# The average number of requests Scrapy should be sending in parallel to
# each remote server
#AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
# Enable showing throttling stats for every response received:
#AUTOTHROTTLE_DEBUG = False

# Enable and configure HTTP caching (disabled by default)
# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
#HTTPCACHE_ENABLED = True
#HTTPCACHE_EXPIRATION_SECS = 0
#HTTPCACHE_DIR = 'httpcache'
#HTTPCACHE_IGNORE_HTTP_CODES = []
#HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage'
